lifespans

"My friend told me there was something in the box, but I didn't know what it was yet. "

""Humans and animals are both considered living beings." "

"The single-celled organism was studied by the biology students in their science class. "

"The teacher explained the new math concept quickly. "

"His outdated wordprocessing software could not read the files I sent."

"The library offered an extension on the due date for the overdue books. "

"The students will become at the school library at 9:00 AM. "

"The current of air coming from the open window is making the papers on my desk flutter. "

"The new desk is longer than the old one, so I have more space to work. "

"By now, you must surely know which is which."

"The length of the classroom is 20 meters. "

"Simple: "Life exists on Earth." Slightly more specific, but still easy to understand: "My old school still exists, even though it's been remodeled." "